74LVC125A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 7 — 11 April 2013 6 of 16
NXP Semiconductors
74LVC125A
Quad buffer/line driver with 5 V tolerant input/outputs; 3-state
10. Dynamic characteristics
[1] Typical values are measured at T
amb
=25C and V
CC
= 1.2 V, 1.8 V, 2.5 V, 2.7 V, and 3.3 V respectively.
[2] t
pd
is the same as t
PLH
and t
PHL
.
t
en
is the same as t
PZL
and t
PZH
.
t
dis
is the same as t
PLZ
and t
PHZ
.
[3] Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
[4] C
PD
is used to determine the dynamic power dissipation (P
D
in W).
P
D
=C
PD
V
CC
2
f
i
N+(C
L
V
CC
2
f
o
) where:
f
i
= input frequency in MHz; f
o
= output frequency in MHz
C
L
= output load capacitance in pF
V
CC
= supply voltage in Volts
N = number of inputs switching
(C
L
V
CC
2
f
o
) = sum of the outputs.
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 8.
Symbol Parameter Conditions 40 C to +85 C 40 C to +125 C Unit
Min Typ
[1]
Max Min Max
t
pd
propagation delay nA to nY; see Figure 6
[2]
V
CC
=1.2V - 12.0 - - - ns
V
CC
= 1.65 V to 1.95 V 1.5 5.4 11.0 1.5 12.8 ns
V
CC
= 2.3 V to 2.7 V 1.0 2.9 5.7 1.0 6.7 ns
V
CC
= 2.7 V 1.5 2.8 5.5 1.5 7.0 ns
V
CC
= 3.0 V to 3.6 V 1.0 2.5 4.8 1.0 6.0 ns
t
en
enable time nOE to nY; see Figure 7
[2]
V
CC
= 1.2 V - 16.0 - - - ns
V
CC
= 1.65 V to 1.95 V 1.0 5.0 12.2 1.0 14.2 ns
V
CC
= 2.3 V to 2.7 V 0.5 2.9 6.8 0.5 7.9 ns
V
CC
= 2.7 V 1.5 3.1 6.6 1.5 8.5 ns
V
CC
= 3.0 V to 3.6 V 1.0 2.3 5.4 1.0 7.0 ns
t
dis
disable time nOE to nY; see Figure 7
[2]
V
CC
= 1.2 V - 7.0 - - - ns
V
CC
= 1.65 V to 1.95 V 2.2 4.6 7.5 2.2 8.7 ns
V
CC
= 2.3 V to 2.7 V 0.5 2.6 4.2 0.5 5.0 ns
V
CC
= 2.7 V 1.5 3.1 5.0 1.5 6.5 ns
V
CC
= 3.0 V to 3.6 V 1.0 3.2 4.6 1.0 6.0 ns
t
sk(o)
output skew time V
CC
= 3.0 V to 3.6 V
[3]
- - 1.0 - 1.5 ns
C
PD
power dissipation
capacitance
per buffer; V
I
=GNDtoV
CC
[4]
V
CC
= 1.65 V to 1.95 V - 6.0 - - - pF
V
CC
= 2.3 V to 2.7 V - 9.4 - - - pF
V
CC
= 3.0 V to 3.6 V - 12.4 - - - pF
